Mayúsculas
Convierte cualquier texto a MAYÚSCULAS al instante.
Cómo usar Mayúsculas
- 1Paste or type your text in the input box
- 2The text is converted to uppercase instantly as you type
- 3Copy the result or download it as a text file
Acerca de Mayúsculas
Our uppercase converter instantly transforms any text into capital letters using JavaScript's native Unicode-aware toUpperCase() method. Whether you need to format headings, create emphasis, or standardize data for processing, this tool delivers accurate results for every character in your input.
The converter works with all scripts and writing systems including accented European characters (é→É, ü→Ü), Cyrillic, Greek, and other Unicode ranges. Conversion happens in real time as you type — no button press is ever needed.
All processing runs entirely in your browser with no data sent to any server, so your text stays private. The tool is equally useful for formatting CSS constants, SQL keywords, test headings, or normalizing data fields for comparison.
Características principales de Mayúsculas
- Instant real-time uppercase conversion as you type
- Full Unicode support including accented and international characters
- Handles Cyrillic, Greek, and other non-Latin scripts correctly
- One-click copy button for the converted output
- Download result as a plain .txt file
- No character length limit — convert documents of any size
- Preserves line breaks and paragraph structure
- Runs entirely offline in your browser with no data transmission
Ejemplos
Normalize a heading for a report
Convert a mixed-case title to all caps for use as a section header or constant.
Entrada
hello world from the editor
Salida
HELLO WORLD FROM THE EDITOR
Uppercase accented European text
Verify that accented characters are correctly uppercased without losing diacritics.
Entrada
café au lait
Salida
CAFÉ AU LAIT
Casos de uso comunes
- Formatting CSS custom property names as uppercase constants
- Converting SQL reserved keywords to uppercase for readability
- Creating all-caps headings for printed reports or posters
- Normalizing text fields to uppercase before database comparison
- Testing form validation that enforces uppercase input
- Generating file names or identifiers that follow an ALL_CAPS convention
Solución de problemas
Expecting accented letters to be replaced with plain ASCII equivalents
Solución
Uppercase conversion preserves accented characters — é becomes É, not E. If you need ASCII normalization, use the Remove Accents tool first, then apply uppercase.
Confusing uppercase with title case
Solución
Uppercase capitalizes every single character. Title Case only capitalizes the first letter of major words. Use the Title Case Converter if you want stylistic capitalization.
Smart apostrophes or curly quotes changing unexpectedly
Solución
Apostrophes and quotation marks are not letters and are not affected by uppercase conversion. If you see unexpected changes, check that your input does not include special Unicode punctuation that only looks like an apostrophe.
Preguntas frecuentes
Does the uppercase converter work with accented characters?
Yes. The converter uses the JavaScript toUpperCase() method which is fully Unicode-aware. Characters like é, ü, ñ, and ç are correctly uppercased to É, Ü, Ñ, and Ç respectively, preserving their diacritics.
Is there a text length limit?
No. All processing runs locally in your browser, so there is no server-imposed limit. In practice, modern browsers handle millions of characters without any noticeable delay.
What is the difference between uppercase and title case?
Uppercase converts every character to its capital form. Title Case only capitalizes the first letter of each major word, following style guide rules about articles and conjunctions. Use uppercase for constants and emphasis; use title case for headings.
Does it preserve line breaks and spaces?
Yes. Only the case of letters is changed. All whitespace, line breaks, punctuation, and special characters remain exactly as they were in the original input.
Can I use this tool for non-English text?
Absolutely. JavaScript's toUpperCase() follows the Unicode standard, so it correctly handles French, German, Spanish, Polish, Russian, Greek, and many other languages that use case-sensitive scripts.
Is my text stored or sent to a server?
No. The tool runs entirely in your browser using client-side JavaScript. Your text never leaves your device and is not logged, stored, or transmitted to any server.
Why does uppercase not change numbers or punctuation?
Uppercase only applies to alphabetic characters. Numbers (0-9), punctuation (.,!?), and symbols have no uppercase form, so they remain unchanged. This is the correct and expected behavior.
How do I convert only part of my text to uppercase?
This tool converts the entire input. To uppercase only a portion, select the relevant text in your word processor and use its built-in case conversion (e.g., Format → Text → Uppercase in Google Docs), or manually split your text into separate conversions.